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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('LACONICA')) { exit(1); }
function get_twitter_data($uri, $screen_name, $password) {
$options = array(
CURLOPT_USERPWD => sprintf("%s:%s", $screen_name, $password),
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FAILONERROR => true,
CURLOPT_HEADER => false,
CURLOPT_FOLLOWLOCATION => true,
// CURLOPT_USERAGENT => "identi.ca",
CURLOPT_CONNECTTIMEOUT => 120,
CURLOPT_TIMEOUT => 120,
# Twitter is strict about accepting invalid "Expect" headers
CURLOPT_HTTPHEADER => array('Expect:')
);
$ch = curl_init($uri);
curl_setopt_array($ch, $options);
$data = curl_exec($ch);
$errmsg = curl_error($ch);
if ($errmsg) {
common_debug("Twitter bridge - cURL error: $errmsg - trying to load: $uri with user $twit_user.",
__FILE__);
}
curl_close($ch);
return $data;
}
function twitter_user_info($screen_name, $password) {
$uri = "http://twitter.com/users/show/$screen_name.json";
$data = get_twitter_data($uri, $screen_name, $password);
if (!$data) {
return false;
}
$twit_user = json_decode($data);
if (!$twit_user) {
return false;
}
return $twit_user;
}
function update_twitter_user($fuser, $twitter_id, $screen_name) {
$original = clone($fuser);
$fuser->nickname = $screen_name;
$fuser->uri = 'http://twitter.com/' . $screen_name;
$result = $fuser->updateKeys($original);
if (!$result) {
common_log_db_error($fuser, 'UPDATE', __FILE__);
return false;
}
return true;
}
function add_twitter_user($twitter_id, $screen_name) {
// Otherwise, create a new Twitter user
$fuser = DB_DataObject::factory('foreign_user');
$fuser->nickname = $screen_name;
$fuser->uri = 'http://twitter.com/' . $screen_name;
$fuser->id = $twitter_id;
$fuser->service = 1; // Twitter
$fuser->created = common_sql_now();
$result = $fuser->insert();
if (!$result) {
common_debug("Twitter bridge - failed to add new Twitter user: $twitter_id - $screen_name.");
common_log_db_error($fuser, 'INSERT', __FILE__);
return false;
}
common_debug("Twitter bridge - Added new Twitter user: $screen_name ($twitter_id).");
return true;
}
// Creates or Updates a Twitter user
function save_twitter_user($twitter_id, $screen_name) {
// Check to see whether the Twitter user is already in the system,
// and update its screen name and uri if so.
$fuser = Foreign_user::getForeignUser($twitter_id, 1);
if ($fuser) {
// Only update if Twitter screen name has changed
if ($fuser->nickname != $screen_name) {
common_debug('Twitter bridge - Updated nickname (and URI) for Twitter user ' .
"$fuser->id to $screen_name, was $fuser->nickname");
return update_twitter_user($fuser, $twitter_id, $screen_name);
}
} else {
return add_twitter_user($twitter_id, $screen_name);
}
return true;
}
function retreive_twitter_friends($twitter_id, $screen_name, $password) {
$uri = "http://twitter.com/statuses/friends/$twitter_id.json?page=";
$twitter_user = twitter_user_info($screen_name, $password);
// Calculate how many pages to get...
$pages = ceil($twitter_user->friends_count / 100);
if ($pages == 0) {
common_debug("Twitter bridge - Twitter user $screen_name has no friends! Lame.");
}
$friends = array();
for ($i = 1; $i <= $pages; $i++) {
$data = get_twitter_data($uri . $i, $screen_name, $password);
if (!$data) {
return NULL;
}
$more_friends = json_decode($data);
if (!$more_friends) {
return NULL;
}
$friends = array_merge($friends, $more_friends);
}
return $friends;
}
function save_twitter_friends($user, $twitter_id, $screen_name, $password) {
$friends = retreive_twitter_friends($twitter_id, $screen_name, $password);
if (is_null($friends)) {
common_debug("Twitter bridge - Couldn't get friends data from Twitter.");
return false;
}
foreach ($friends as $friend) {
$friend_name = $friend->screen_name;
$friend_id = $friend->id;
// Update or create the Foreign_user record
if (!save_twitter_user($friend_id, $friend_name)) {
return false;
}
// Check to see if there's a related local user
$flink = Foreign_link::getByForeignID($friend_id, 1);
if ($flink) {
// Get associated user and subscribe her
$friend_user = User::staticGet('id', $flink->user_id);
subs_subscribe_to($user, $friend_user);
common_debug("Twitter bridge - subscribed $friend_user->nickname to $user->nickname.");
}
}
return true;
}
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